Some zoos have unique and amazing residents. Not so long ago, Zoo Atlanta celebrated the 6th birthday of their gorilla, Anaka. The staff commemorated the event by taking a few pictures of the big girl and sharing them on Facebook. Several netizens sent their best wishes. But the more observant ones noticed an interesting detail. Anaka has a unique patch of pigment (or the lack of it) on her hand. The close up of the picture shows a pink, human-like hand. Gorillas have many similarities with humans, like possessing opposable thumbs. They also have individualized fingerprints and toeprints which can be used for identification purposes, just like for us humans. Also, primates have fingernails and toenails instead of claws. Still, the photos caught many by surprise. Some of them thought the gorilla must have vitiligo, a harmless, long-term skin disorder characterized by white patches that appear on different parts of the body. This occurs in about 1 percent of the human population, but it can also occur in animals. A curious person asked the zoo about the condition, and their reply was “Well her skin pigment has always been like that and hasn’t changed over the years, so we think it’s just a cool birthmark.” Whatever the case may be, there is nothing wrong with it, be it vitiligo or an unusual birthmark. It does make for a surprising detail that promotes a second look (or even a third and fourth). According to the zoo, it is not just her skin pigment that is unique, but her personality as well. “She’s often barking at her mom and others to get a prime spot for food and juice,” the zoo wrote on their website. “ She is often seen riding piggyback on her brother and sisters,” they add. Anaka certainly knows how to have a good time, and how to get attention.